Assume you are the head of the Secret Service and the President is
about to arrive in Europe, where he will spend Monday in Lisbon,
Tuesday in Madrid, Wednesday in Rome, Thursday in Prague and Friday in
Paris. But just before he departs on Sunday night, you received
intelligence from a source that an assassin plans to attempt to
assassinate the President on one of those five days in one of those
five cities. You further are told that you will not know which day or
which city before the President arrives in that city on that day.

Assuming the information is accurate, can any of these cities be
logically ruled out as the possible place of the attack? If so, which
one(s) are safe for the President to visit?

This looks to me like a restatement of the famous "unexpected hanging" problem.

http://en.wikipedia.org/wiki/Unexpected_hanging_paradox

No & None.Twinds